Research on Residual Current Protective Device Based on Micro-Controller of MSP430

2013 ◽  
Vol 662 ◽  
pp. 838-841
Author(s):  
Jian Feng Liu ◽  
Yong Guo Sun
Keyword(s):  
Power Supply ◽  
Climatic Condition ◽  
High Performance ◽  
Time Lag ◽  
Residual Current ◽  
Present Condition ◽  
Protective Device ◽  
Current Value ◽  
Automatic Reclosing ◽  
Current Operating

A residual current protector based on high performance micro-controller MSP430 is introduced. The micro-controller MSP430F149 is used as the main controller in the device, which can detect the real-time residual current value. And the residual current operating value can be switched automatically according to the present condition of the power system. When the protection is occurred, the residual current protective device has the inverse time lag function, ideal time delay and the automatic reclosing function. So the residual current protective device can be used at all kinds of complicated rural grid and climatic condition, and the safety and the reliability of the power supply can be ensured.

An Improvement to Single-Phase RCD Based on MSP430

2011 ◽  
Vol 383-390 ◽  
pp. 6986-6991
Author(s):  
Wen Jun Huai ◽  
Zhou Xing Fu ◽  
Xiao Fan Wu
Keyword(s):  
Integrated Circuit ◽  
Single Phase ◽  
Low Voltage ◽  
Time Lag ◽  
Electrical Equipment ◽  
Residual Current ◽  
Resonant Circuit ◽  
Iron Core ◽  
Phase System ◽  
Current Value

A new type residual current protector is designed in this paper. Using residual magnetic flux and the resonance voltage as leakage current signal in iron core, when there are residual current in power suply system, the device can automatically take relevant actions according to the real-time residual current value that is detected by detection circuit. The protector can be used to against electric shock and protect a ground fault. When the protection is occurred, the residual current protective device (RCD) possesses the inverse time lag function, ideal time delay and the automatic reclosing function. It also transmits the fault information to control center by the inter-integrated circuit (I2C) bus. Resonant circuit can avoid live parts injury, which limit the current value through contact resistance, and does not interrupt the work of electrical equipment. So the RCD can be used in all kinds of low voltage single-phase system that will snsure the safety and the reliability of the power supply.

Study on the Residual Current Protection Device Technology

2014 ◽  
Vol 8 (1) ◽  
pp. 404-411 ◽  
Author(s):  
Guo Rongyan ◽  
Zhang Honghui
Keyword(s):  
Distribution System ◽  
Low Voltage ◽  
Residual Current ◽  
Electrical Safety ◽  
Protective Device ◽  
Protection Device ◽  
Voltage Distribution ◽  
The People ◽  
Safety Protection ◽  
Device Technology

As an important electrical safety protection device in low voltage distribution system, residual current protection device is to protect the insulation line leakage fault; the electric shock of the people plays an important role in fault. From the protection characteristics of residual current protective device to points, those can be divided into, residual current protection device for residual pulsating direct current and residual dc, according to the residual sinusoidal alternating current.

scholarly journals Uninterruptible Power Supply Improves Precision and External Validity of Telomere Length Measurement via qPCR

2020 ◽  
Vol 1 ◽  
Author(s):  
Waylon J. Hastings ◽  
Dan T.A. Eisenberg ◽  
Idan Shalev
Keyword(s):  
Telomere Length ◽  
Power Supply ◽  
External Validity ◽  
High Performance ◽  
Epidemiological Studies ◽  
Storage Conditions ◽  
Amplification Efficiency ◽  
Uninterruptible Power Supply ◽  
Uninterruptible Power ◽  
The Impact

Abstract Technical challenges associated with telomere length (TL) measurements have prompted concerns regarding their utility as a biomarker of aging. Several factors influence TL assessment via qPCR, the most common measurement method in epidemiological studies, including storage conditions and DNA extraction method. Here, we tested the impact of power supply during the qPCR assay. Momentary fluctuations in power can affect the functioning of high-performance electronics, including real-time thermocyclers. We investigated if mitigating these fluctuations by using an uninterruptible power supply (UPS) influenced TL assessment via qPCR. Samples run with a UPS had significantly lower standard deviation (p < 0.001) and coefficient of variation (p < 0.001) across technical replicates than those run without a UPS. UPS usage also improved exponential amplification efficiency at the replicate, sample, and plate levels. Together these improvements translated to increased performance across metrics of external validity including correlation with age, within-person correlation across tissues, and correlation between parents and offspring.

scholarly journals Present Condition and its Subject of AC Power Supply for Vehicle

2003 ◽  
Vol 29 (1) ◽  
pp. 47-54
Author(s):  
Koji Soshin ◽  
Hirotada Higashihama ◽  
Hisahi Usui ◽  
Toshiaki Saito ◽  
Yoji Minami ◽  
...  
Keyword(s):  
Power Supply ◽  
Present Condition ◽  
Ac Power

Rack Server Solution in Data Center

2015 ◽  
Author(s):  
Sheng Kang ◽  
Guofeng Chen ◽  
Chun Wang ◽  
Ruiquan Ding ◽  
Jiajun Zhang ◽  
...  
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Power Supply ◽  
Data Center ◽  
Power Efficiency ◽  
High Performance ◽  
High Efficiency ◽  
High Growth ◽  
General Purpose ◽  
Power Supplies

With the advent of big data and cloud computing solutions, enterprise demand for servers is increasing. There is especially high growth for Intel based x86 server platforms. Today’s datacenters are in constant pursuit of high performance/high availability computing solutions coupled with low power consumption and low heat generation and the ability to manage all of this through advanced telemetry data gathering. This paper showcases one such solution of an updated rack and server architecture that promises such improvements. The ability to manage server and data center power consumption and cooling more completely is critical in effectively managing datacenter costs and reducing the PUE in the data center. Traditional Intel based 1U and 2U form factor servers have existed in the data center for decades. These general purpose x86 server designs by the major OEM’s are, for all practical purposes, very similar in their power consumption and thermal output. Power supplies and thermal designs for server in the past have not been optimized for high efficiency. In addition, IT managers need to know more information about servers in order to optimize data center cooling and power use, an improved server/rack design needs to be built to take advantage of more efficient power supplies or PDU’s and more efficient means of cooling server compute resources than from traditional internal server fans. This is the constant pursuit of corporations looking at new ways to improving efficiency and gaining a competitive advantage. A new way to optimize power consumption and improve cooling is a complete redesign of the traditional server rack. Extracting internal server power supplies and server fans and centralizing these within the rack aims to achieve this goal. This type of design achieves an entirely new low power target by utilizing centralized, high efficiency PDU’s that power all servers within the rack. Cooling is improved by also utilizing large efficient rack based fans for airflow to all servers. Also, opening up the server design is to allow greater airflow across server components for improved cooling. This centralized power supply breaks through the traditional server power limits. Rack based PDU’s can adjust the power efficiency to a more optimum point. Combine this with the use of online + offline modes within one single power supply. Cold backup makes data center power to achieve optimal power efficiency. In addition, unifying the mechanical structure and thermal definitions within the rack solution for server cooling and PSU information allows IT to collect all server power and thermal information centrally for improved ease in analyzing and processing.

Ultra High performance, lead free Bi2WO6: P(VDF-TrFE) based triboelectric nanogenerator for self-powered sensor and smart electronic applications

2022 ◽  
Author(s):  
Dhiraj Bharti ◽  
Sushmitha Veeralingam ◽  
Sushmee Badhulika
Keyword(s):  
Output Power ◽  
Power Supply ◽  
High Performance ◽  
Lead Free ◽  
Triboelectric Nanogenerator ◽  
High Output Power ◽  
Self Powered ◽  
Triboelectric Nanogenerators ◽  
High Output

Obtaining sustainable, high output power supply from triboelectric nanogenerators still remains a major issue which restricts their widespread use in self-powered electronic applications. In this work, an ultra-high performance, non-toxic,...

Hearing Reaction Time Measurement Concentration Level Tool Integrated Android Smartphone

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Muhamad Arif Indiarto ◽  
Syamsudduha Syahrorini
Keyword(s):  
Reaction Time ◽  
Power Supply ◽  
High Performance ◽  
Concentration Level ◽  
Time Measurement ◽  
Push Button ◽  
High Productivity ◽  
Measurement Results ◽  
Reaction Time Measurement ◽  
Execution Speed

Performance in a job is very important because it will have an impact on the assessment and productivity of an employee, one of the indicators for evaluating high performance is related to concentration, execution speed and high productivity of the employee. Concentration is needed in working to prevent fatal accidents. In this study, it is possible to monitor measurement results via a smartphone, namely by using the Bluetooth HC-05 sensor as an integration to a smartphone. With 8 pushbutton, Arduino UNO microncontroller, Bluetooth HC-05, 16x2 LCD, and Buzzer. This tool works alternately when the push button Start is pressed, the power from the power supply will provide an electric current to the microncontroller, and continue to be connected to the Bluetooth HC-05, then by providing pushbuttons pressing input. Each pressing instruction on the pushbutton provides a different sound output, consisting of sound output, High, Mid, and Low. And continue on the LCD, and can display the results of the input that has been processed by the microcontroller. The output results are in the form of the amount of time displayed on the LCD, the sound from the buzzer, and from a series of work tools and the output results can be monitored via android smartphone. The results of this study are the accuracy of the tool in each variable low 99%, mid 90%, high 92%. The average tool ranges from 2.44. The error is low 7,4%, mid 7,4%, high 7,6%.

scholarly journals Servant Leadership Style and High-Performance Work System Practices: Pathway to a Sustainable Jordanian Airline Industry

2019 ◽  
Vol 11 (22) ◽  
pp. 6191 ◽  
Author(s):  
Rawan Alafeshat ◽  
Cem Tanova
Keyword(s):  
Servant Leadership ◽  
Organizational Performance ◽  
Employee Engagement ◽  
Airline Industry ◽  
Employee Satisfaction ◽  
Employee Retention ◽  
High Performance ◽  
Time Lag ◽  
Equation Modeling ◽  
Full Time

The purpose of this study is to examine how servant leadership (SL) and high-performance work systems (HPWS) practices enable organizational performance, as shown by employee retention and employee satisfaction. Data was obtained from 300 full time employees in a private airline company in Jordan. The data was collected in three rounds, each separated by one-week time-lag. Structural equation modeling was used to test the proposed relationships and revealed that both servant leadership and HPWS practices were positively linked with employee satisfaction and retention, which were used as indicators of organizational sustainability. In order to understand how servant leadership and HPWS influence employee satisfaction and retention, we investigated the mediating role of employee engagement and discovered that it serves as a critical mechanism. The study affirmed that, in line with studies carried out in the west, servant leadership is also an effective leadership characteristic in the context of Jordan. Furthermore, the study helps to clarify the reason that servant leadership and HPWS lead to positive outcomes, due to the fact that these improve the engagement of employees. Thus, we understand that the increases in employee retention and satisfaction are due to the enhanced engagement of employees, and we show that engagement can be improved both by servant leadership and the application of HPWS in organizations. Consequently, the effectiveness and sustainability of the airline companies in Jordan will need to focus on primarily improving employee engagement.

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